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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Package: noscrypt
* File: nc-util.h
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with noscrypt. If not, see http://www.gnu.org/licenses/.
*/
#pragma once
#ifndef _NC_UTIL_H
#define _NC_UTIL_H
#include "platform.h"
/* NULL */
#ifndef NULL
#define NULL ((void*)0)
#endif /* !NULL */
#ifdef DEBUG
/* Must include assert.h for assertions */
#include <assert.h>
#define DEBUG_ASSERT(x) assert(x);
#define DEBUG_ASSERT2(x, message) assert(x && message);
/*
* Compiler enabled static assertion keywords are
* only available in C11 and later. Later versions
* have macros built-in from assert.h so we can use
* the static_assert macro directly.
*
* Static assertions are only used for testing such as
* sanity checks and this library targets the c89 standard
* so static_assret very likely will not be available.
*/
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
#define STATIC_ASSERT(x, m) static_assert(x, m)
#elif !defined(STATIC_ASSERT)
#define STATIC_ASSERT(x, m)
#pragma message("Static assertions are not supported by this language version")
#endif
#else
#define DEBUG_ASSERT(x)
#define DEBUG_ASSERT2(x, message)
#define STATIC_ASSERT(x, m)
#endif
#include <stdint.h>
#if SIZE_MAX < UINT32_MAX
#define _overflow_check(x) if(x > SIZE_MAX) return CSTATUS_FAIL;
#else
#define _overflow_check(x)
#endif
typedef struct memory_span_struct
{
uint8_t* data;
uint32_t size;
} span_t;
typedef struct read_only_memory_span_struct
{
const uint8_t* data;
uint32_t size;
} cspan_t;
static _nc_fn_inline void ncSpanInitC(cspan_t* span, const uint8_t* data, uint32_t size)
{
span->data = data;
span->size = size;
}
static _nc_fn_inline void ncSpanInit(span_t* span, uint8_t* data, uint32_t size)
{
span->data = data;
span->size = size;
}
#endif /* !_NC_UTIL_H */
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